Suction appliance.



Patented Sept. 17,1918

F. M. CASE.

SUCTION APPLIANCE. APPLICATION FILED SEPT. 29. 1914.

IINITED STATEE EATENT @I FIQE.

FRANCIS M. CASE, OF CLEVELAND, OHIO, ASSIGNOR OF ONE-HALF TO C. S.BRITTON AND ONE-HALF TO JAMES E. DOYLE,.BOTH OF CLEVELAND, OHIO.

SUCTION APPLIANCE.

Specification of Letters Patent.

Patented Sept. 17, 1918.

To all whom it may concern:

Be it known that I, FRANCIS M. CAsn, a citizen of the United States,residing at Cleveland, in the county of Cuyahoga and State of Ohio, haveinvented a new and use ful Improvement in Suction Appliances, of whichthe following is a specification, the principle of the invention beingherein explained and the best mode in which I have contemplated applyingthat principle, so as to distinguish it from other inventions.

My invention is particularly associated with the relative configurationof such parts of the motor and fan as surround the re quired bearingsurfaces.

The specific object, besides providing a durable, simple and henceeconomical improvement, is to protect the lubricant upon the bearingsurfaces, from the suction efiect of the impeller. The means which Ihave devised for preventing the subjection of such bearing surfaces tothe damaging tendency on the part of a sustained flow of air to drywhile simple is quite elficacious.

My inventive conception is associated with means which are hereinafterexplained and variously combined in the claim. /Vhile the annexeddrawing and particular description thereof, set forth in detail thepreferred form embodying my invention, it should be understood that themeans only exemplifies one of many diversified mechanical forms withwhich the principle of my invention may be properly applied.

Adverting to the drawing:

Figure I is part elevation, part section of a construction. embodying myinvention.

Fig. II is a similar view on a transverse line of vision.

The structure illustrated in the drawing will be seen to comprise anelectric motor A having a laterally projecting bearing a in which amotor shaft a is movable and from which such shaft projects a givendistance as seen in Fig. II. The motor A is mounted upon any suitabletype of base B including, however, as a portion of its top a surface Z)located underneath the projecting bearing a.

The pair of complementary annular casing members C and D having concavesides opposed to and spaced from each other, are held in such positionin a manner now described, and are adapted to inclose the revoluble imeller. The casing member C is provided slow with a transversally extending flange 0 adapted to rest upon the surface 6 and be secured theretoin any approved manner. The flange 0 is connected with the upper portionof the casing member C by means of a pair of stiifening webs 0 The outercircumference of the casing member C is fashioned as an outwardly bentangular flange 0 while centrally such casing member is provided with anopening o somewhat larger than the bearing a. The complementary easingmember D involves a centrally flared portion (5 in connection with anopening (Z above, and its outer circumference is similarly fashioned asan outward-bent angular flange (F. The casing members and D are securedto each other in the desired position by means of a pair ofcomplementary securing rings E and E. Below the rings E and E areenlarged and constitute wholly tangential extensions 6 and c as seen inboth of the figures in the drawing. The casing members C and D aresecured to the inner annular edge of the rings E and E respectively bymeans of a plurality of rivets 6 Similarly the outwardly disposed flangeedges of the rings E and E are aliixed to each other by a plurality ofcircumferential and tangential rivets e As so arranged the opening 0 isdisposed substantially opposite the opening (Z and merely hindered ofdirect connection therebetween because of the interpositioning of theimpeller to be described in the next paragraph.

An impeller F is carried at f upon the projecting end a of the shaft andincludes in its structure a plurality of radially disposed vanes F. Theshape of the vanes f is such that the revolution thereof produces astrong suction effect or flow in the direction from the openings 0 and(Z and toward the tangential exhaust outlet. Heretofore, so far as I amaware, the objectionable tendency of an atmospheric disturbance to dry alubricated bearing has been allowed full play. It is for the purpose ofprecluding the possibility of such an occurrence that I have designedthe impeller F so as to carry a collar f adapted to project through theopening 0*. The collar f is spaced from the edges of the opening 0 andfurthermore extends both beyond the outer side of such edge and theextremity of the bearing a" a sufficient distance to divert the inducedflow of air from the latter. In accordance with my constructions the aircurrent rushes in the direction of least resistance through the opening0 outwardly adjacent the collar f friction whereby its working life andefii ciency are increased.

I claim A suction appliance comprisin an electric motor frame having abearing a motor shaft rotatable therein and projecting therefrom, acasing provided with induct-ion and discharge openings, the inductionopening being intersected by said shaft, an impeller carried on theprojecting end of said shaft close to said bearing, said impeller beingmovable in said casing and between said the end of such bearing in adirection reverse a to that of the projecting portion of said shaftwhereby to ward off from such bearing the counter air current passingthrough such induction opening.

Signed by me, this 12th day of Sept. 1914.

i FRANCIS M. easn. Attested by B. W. vBRooKnT'r, MARIE WAGNER.

Copies of this-patent may be obtained for five centseach, by addressingthe Commissioner of Patents washington D. O.

